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United States Patent | 5,310,009 |
Rowlett | * May 10, 1994 |
A cutting insert and a wear insert for use in an agricultural tool having a cutting edge for forming a furrow. The agricultural tool includes an essentially syncline shaped slicer having a leading member, a trailing member and a pair of sides tapered from the trailing member toward a sharp convex cutting edge extending longitudinally upwardly and forwardly from the trailing member toward the leading member. A leading deflector extends upwardly and forwardly from the cutting edge and is formed integral the slicer by a mounting web. The mounting web includes a pair of sides extending rearwardly from the leading deflector and expanding to a heel having first and second sides adjoining respective sides of the syncline shaped slicer and a rear portion. Each of the first and second sides having formed therein a notch and having affixed thereto a wear insert. A cutting insert is secured within a slot along the cutting edge.
Inventors: | Rowlett; Don C. (Bedford, PA) |
Assignee: | Kennametal, Inc. (Latrobe, PA) |
[*] Notice: | The portion of the term of this patent subsequent to November 3, 2009 has been disclaimed. |
Appl. No.: | 918301 |
Filed: | July 21, 1992 |
Current U.S. Class: | 172/723; 172/747; 172/768; 172/772 |
Intern'l Class: | A01L 005/06; A01L 023/02 |
Field of Search: | 172/723,725,747,763,765,771,772,772.5,719 111/125,153,139 |
11720 | Feb., 1899 | Brennan et al. | |
465220 | Dec., 1891 | Steinke et al. | |
513664 | Jan., 1894 | Baughman et al. | |
1965950 | Jul., 1934 | Walker. | |
2885014 | May., 1959 | Hargis. | |
2903982 | Sep., 1959 | Flay | 111/125. |
3125169 | Mar., 1964 | Geisler. | |
3970445 | Jul., 1976 | Gale et al. | |
4321972 | Mar., 1982 | Robertson et al. | |
4356780 | Nov., 1982 | Bauman. | |
4457381 | Jul., 1984 | Wetmore. | |
4744316 | May., 1988 | Lienemann et al. | |
4756102 | Jul., 1988 | Chapman | 172/719. |
4770253 | Sep., 1988 | Hallissy et al. | |
4955297 | Sep., 1990 | Tsukamoto | 172/719. |
5159985 | Nov., 1992 | Rowlett | 172/747. |
Foreign Patent Documents | |||
2626433 | Aug., 1989 | FR | 172/747. |
WO85/03618 | Aug., 1985 | WO. | |
1316580 | Jun., 1987 | SU | 111/153. |
Acra-Plant "Tools for the Advancement of Agriculture"--Product Review (1989). McGraw-Hill Dictionary of Scientific and Technical Terms 2nd Ed., p. 723, Copyright 1974, 1976, 1978. |